The seasonal temperature impacton tree terms of emission trees allergenic pollen
Climate change impacts all the processes observed in living beings including allergenic pollen production and emission. The aim of study was to analyse the climate change impact on tree pollination in Vinnitsa, city of the Central Ukraine. The article deals with the tree pollen season changes through the 15 years of observations. Tree pollination pattern were recorded by using the gravimetric sampling for the years 1999-2000 and by employing the volumetric trap in the years 2009-2015. It was found alder and birch pollination can be recorded at about a month earlier in the current period than it was at the end of the 20th century. Early Alnus pollination correlates with the seasonal temperature sum increase and with the average month temperature value on January and on February preceding the corresponding pollen season. Factor promoting the earl start, peak and the end of the Betula pollen season was the speed of the degree-days accumulation. The effect similar to that observed for Betula was seen for Ulmus, Corylus, Fraxinus and Carpinus. Other trees like Populus, Acer, Juglans, Aesculus, Quercus and Pinus did not demonstrate the significant change of the pollination patterns over the investigation time. The tendencies established are important for the correct hay fever forecast.